Coil-winding machine



yea 19, 1929. 1,702,475

C. F. JAHNIG GOIL WI NDING MACHINE Filed June 27, 1925 S Sheets-Sheet lINVENTOR :ATTOiQNEY iF e bo 19, 1929 11 702375 c. F. JAHNZ-G COILWINDING MACHINE Filed June 27,, 1925 3 S'neecs-Sheei 2 Febb 19, 19291,792,475

c. F. JAHNH$ COIL WINDING MACHINE File June 27, 1925 s Sheets-Sheet 3Mgr/55%;;

Patented Feb. 19, 1929.

UNITED STATES PATENT OFFICE.

CHARLES F. J'AHNIG, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO WESTING-HOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYL- VANIA.

COIL-WINDING MACHINE.

Application filed June 27, 1925. Serial No. 39,910.

My invention relates to coil-winding machines and particularly tomachines for winding coils in the armature cores of small motors.

It is one object of my invention to provide a coil-winding machine forwinding armatures of dynamo-electric machines which shall be automaticin its function of winding a predetermined number of turns of insulatedconductor wires in the slotted openings of the armature cores.

Another object of my invention is to provide a coil-winding machine ofthe abovedesignated character which shall provide uniform starting andrunning conditions of speed of the winding head and which shall have auniform acceleration in the starting and stopping of the windingelement.

Another object of my invention is to provide a coil-winding machine inwhich the maximum windng speed may be determined or prescribed for anyparticular range of work, that is, for any given size of coil or wiresizes, for example.

Another object of my invention is to provide a machine embodying meansfor securing an armature to be wound in such manner as to facilitate thewinding of the armature coils thereon with great rapidity and at minimumcost.

Another object of my invention is the provision of means for ensuringaccuracy in the number of turns of the windings by means of automaticregulation of a counter mechanism that cooperates with the motor circuitof the winding head to automatically deener- 'gize the same.

Still another object of my invention is to provide an electrical controlsystem in connection with the motor circuit and the startand-stopmechanism which shall coordinate the several cooperating parts of themachine to stop the actuating mechanism in practically the same positioneach time, thus permitting the operator to properly bring out the coilleads for making electrical connections and for starting the next coilto be Wound.

My invention contemplates the making of a semi-automatic coil-windingmachine that is of simple, durable, and compact construction, whichshall comprise a minimum number of working parts and which is readilyaccessible for manipulation and operation and for the purpose ofrenewing the elements sub ected to the greatest wear.

The several improved features of my device will become more apparent inthe followmg detailed description of my invention taken in connectionwith the accompanying drawings, in which like reference charactersdesignate like parts, and in which,

Figure 1 is a side elevational view of a coilwinding machine embodyingthe principles of my invention;

2 is a top plan view thereof;

Figs. 3 and 4 are respective views in top elevation and longitudinalcross-section of a special chuck device, embodied in the machine shownin Figs. 1 and 2 for the purpose of securing the armature or coil formto be wound, and

Fig. 5 is a diagram of the electrical control system utilized in theoperation of my device.

Referring to Fig. 1 of the drawing, the device illustrated thereincomprises a station ary bed 1 having a winding head 2 mounted on one endthereof, which head comprises an electric motor 3 having an extendedarmature shaft i on one end thereof and a flywheel 5 on its other end,together with a brake mechanism 6 including a pair of magnet coils 7 and8. The coil 7 is adapted to efi'ect full application of the brake, whilecoil 8 maintains the brake in its off position.

A spindle 9 is mounted coaxially with the shaft 4, of the motor in atail-stock 10 at the other end of the bed 1. The spindle 9 is providedwith a portion of a chuck member 11. against the shoulder of which isdisposed a coil spring 12, one end of which rests against a spacingcollar 13 that acts as a thrust hearing against the face of thetail-stock 10. The other end of the spindle 9 is provided with a disc14, which is secured thereto by a nut 15 to provide a relatively wideflange portion that is adapted for engagement with a roller 16 of amechanical linkage 17, which terminates in a suitable pedal, (not shown)that is secured on a vertical rod 18. The linkage 17 is biased by a.coil spring 19 bearing against the under side of the bed 1 to eliminatepressure on the roller 16, thus permittin the spindle 9 to assume anatural longitu inal position as determined by the coil spring 12.

The spindle 9 is further provided with a worm 20 between the verticalstandards of the tail-stock 10, and a worm gear 21 is suitablyjournalled for rotation transversely of the axis of the spindle 9, beingadapted to interact at its periphery 22 with the worm 20. The wheel 21is provided with a spiral or clock spring 23 by which it is biased inone direction against the teeth of the worm 20, so that when the worm 20becomes disengaged, the gear 21 will rotate to its normal position bythe unwinding of the spring 23.

The spring element 23 is secured-atone end to a crank 24 that isnormally held stationary by a pin 25, which is an extended portion of avertical rod 26 terminating at a bracket 27 that is pivoted at'a joint28 on the under side of the bed 1. Any angular movement of the bracket27, such as may be effected by pressure against its face 29, willdisengage the wheel 21 from the worm 20, thus permitting the spiralspring 23 to unwind. The face of the gear 21 is provided withgraduations 30 that correspond to a certain number of turns of the worm20 and directly indicate the number of turns of wire. The latter isfurther provided with transverse openings 31, which are adapted toreceive a stop 32 that cooperates with a contact finger 33. Figs. 2 and5,

for a purpose that will be hereinafter set forth.

The extended armature shaft 4 of the motor 3 is provided with a portion34 of a chuck mechanism that cooperates with the portionv 11 on thespindle 9 for the purpose of securing a coil form or armature 35 to bewound. (See Figs. 3 and 4.) The cooperating faces of the chuck members11 and 34 are cylindrical in form and their size corresponds to thatofthe outer periphery of the armature 35. The member 11 is furtherprovided with a bracket 36'ha'vin a top opening 37 for receiving one end0 the armature shaft 38 and has a stop 39 at its lower end, upon whichthe lowerportion of the armature shaft rests. The central portion of thecylindrical face of the member 11 is provided with an opening throughwhich a spring finger 40 extends to constitute a stop or positioningelement for theslotted openings 41 of the armature 35.

The spring member 40 is secured to a plunger 42 that is biased radiallyoutward by a coil spring 43. This plunger is. movable axially to providemovement of the spring finger 40 for the purpose of indexing thearmature 35 to bring one of its webs or teeth in engagement with theslotted opening 44 of a thumb latch 45 that is pivoted in the portion 34of the chuck. To indexthe armature 35 by means of the spring-biasedplunger 42, it is necessary to push the latch 45 out of engagement withthe armature.

The member 34 is further provided with wire guides or fins 46 foralining the wire with the slots 41 of the armature to be wound.Associated with the chuck mechanism is a wire guide and tensi0n devicewhich comwheels 47 to the coil form or armature 35 that is mounted inthe chuck device.

Referring to Fig. 5 of the drawing, the diaphragm shown thereinillustrates the control circuit by means of which the machine isoperated semi-automatically in connection with i the winding motor andthe counter mechanism. The driving motor 3 is a threephase motor adaptedto be connected to the supply conductors L L and L as follows: through arheostat 55 to the line L and through switch 56 to the lines L and L andis controlled through a circuit comprising a start-stop push-buttonstation 57 of a familiar type, actuating brake magnet coil 8,

coil 58, contact member 59 and contact finger 33. In the oppositeposition of finger 33, the brake magnet coil 7 is substituted for thecompanion coil 8 in the above-traced circuit.

The operation of my device is briefly as follows: i

An armature 35 to be wound is secured in the chuck members 11 and 34, asshown in the several figures of the drawing. The end of the wire fromwhich the coil is to be wound is extended from the supply reel 49 overthe wheels 47 as shown in Figs. 1 and 2 and is secured in the slot ofthe armature, two of which slots are in transverse alinement, as shownin Fig. 3.

The brake magnet coil 8 is initially energized to hold the brake 6 inits off position by reason of gear wheel 21 being disposed in its normalor zero position. This initial circuit of coil 8 extends from conductorL through control finger 33, contact member 59, coil 8, andthence-through station 57 to conductor L".

V The motor 3 is then energized by closing the starting switch of pushbutton station 57, Fig. 5, thus establishing the previously tracedcircuit.

The motor shaft 4 is thus actuated to rotate the chuck and the armature35 held thereby, together with the spindle 9. The worm 20 and wheel 21of the counter mecha nism rotate until the proper number of turns ofwire have been applied, whereupon the stop 32 engages the contact finger33, Figs. 2 and 5, whereupon its normal contact with the contact member59 is broken, thereby opening the circuit of actuating coil 58 of switch56 to deenergize the motor, and to simultaneously deenergize the brakemagnet as the motor slows down to almost a standstill, contact is madeby the finger 33 with the contact member 60, thus energizing the brakecoil 7, which stops the motor almost instantly in practically the sameangular position each time. The operator presses against the face 29 ofthe pivoted bracket 27 to release the spring on the counter device,which thereupon assumes its zero position and causes the contact members33 and 59 to reengage as shown in Fig. 5, thus putting the motor circuitin condition to permit re-starting as soon as the starting button isclosed and releasing the brake mechanism to permit rotation of thewinding head. The operator then steps on the pedal at the end of the rod18 to operate the linkage 17 which effects a longitudinal movement ofthe spindle 9 against the tension of the coil spring12, thus releasingthe armature 35, which is indexed to bring its slots in a new position,by pushing the plunger 42, and simultaneously shifting the latch 45 outof position. The pedal is then released, thus securing the armature inits new position. This operation is repeated as often as necessary tocomplete winding the slots of the armature 35 or winding coil formswhich may be secured by the chucking mechanism in place of the armature.

It is evident from the foregoing description of my invention that acoil-winding machine made in accordance therewith provides a simple andefiicient means for semi-automatically winding the coils of armature orother coil forms at a minimum cost and in a uniform and efficientmanner. The semiautomatic regulation of thismachine assures an accuratenumber of turns independent of the attention of the operator and also auniform quality of work, since the winding of the wire in the coil formis entirely regulated by the wire guide and tension device.

B y means of the rheostat 55, shown in Fig. 5 and the fly-wheel 5, Fig.1, together with the magnets 7 and 8 of the brake mechanism, a suitablespeed and uniform acceleration for starting and stopping the windinghead may be obtained, for a considerable range of wire sizes and coilsizes, and by forming the flywheel 5 as a hand-wheel, further assuranceagainst breakage of the wire is provided by the personal attention, ofthe operator, whose hands are free to be employed in the engagement ofthe hand-wheel.

Although I have described a. specific embodiment of my invention, itwill be obvious to those skilled in the art that various modificationsmay be made in the details of construction, the design and arrangementof the several cooperating parts and in the application of my device tothe winding of various coil forms, without departing from the principlesherein set forth.

Lclaim as my invention:

1. A coil-Winding machine comprising a stationary bed member, a motormounted thereon, a spindle journalled for rotation on said bed coaxiallywith the shaft of said motor, a work-holder mounted on said motor shaftand spindle and adapted to secure a coil form, a revolution counterassociated with said spindle having contact members adapted to controlthe motor, a flywheel on said motor to provide uniform acceleration ofthe motor shaft at starting, a brake for said 'motor, means for holdingsaid brake in its off position during the operation of said motor, andmeans for setting said brake at. a predetermined time after opening thecircuit of said motor.

2. A coil-Winding machine comprising a stationary bed -member, a motormounted thereon, a spindle journalled for rotation on said bed coaxiallywith the shaft of said motor, a work-holder mounted on said motor shaftand spindle and adapted to se-v cure a coil form, a revolutioncounterassociated with said spindle having contact members adapted to controlthe motor, means for setting said counter for a predetermined number ofturns of the spindle, and a stop mechanism controlled by said counterfor stopping said spindle at a predetermined time after the motor hasbeen deenergized.

3. A coil-winding machine comprising a stationary bed, a winding headand a spindle coaXially mounted on said bed, Wire guide and tensionmeans associated with said head, a counter mechanism for said spindle,and speed-regulating means for said head and spindle, said regulatingmeans comprising a motor having a shaft. extension, a flywheel and abrake, electromagnetic means for governing said brake, and control meansfor said motor comprising starting apparatus, a brake magnet and meansfor opening the motor circuit and subsequently energizing the brake.nagnet circuit.

4:. In a coil-winding machine, the combination with a winding head,including a motor, of a spindle mounted coaxially therewith, a countermechanism associated with said spindle and a speed regulating andcontrol system for said motor, said system comprising startingapparatus, a pair of brake magnets, and a movable contact member forbreaking the motor circuit and establishing circuits for said magnets,said system operating to deenergize the motor circuit. andsimultaneously dcenergize the magnet that secures the motor brake in itsreleased position and subsequently energize another magnet to lock themotor shaft.

5. A coil-winding machine comprising a stationary bed, a winding headcomprising a driving motor, a brake mechanism for said winding head,electromagnetic means for applying said brake and independentelectromagnetic means for holding said brake in the released position, aspindle mounted coaxially with said winding head, a counter mechanismassociated with said spindle,

and a movable cont-act member adapted Winding machines, a worm, acooperating worm wheel in engagement therewith, an electricalcontactingdevice, stops on said Worm wheel adapted to cooperate with thecontacting device, means for manually disengaging the worm wheel fromthe Worm and resilient means ,for turning the Worm wheel to apredetermined position when so disengaged.

7. In a stop-motion mechanism for coilwinding machines, a Worm, a wormcooperating wheel, a movable bracket for supporting the worm wheel, anelectrical contacting device, a stop member adjustably mounted on saidworm wheel and disposed to cooperate with the contacting device, meansfor moving the worm Wheel out of engagement with the worm and a springfor turning the Worm wheel to its zero position.

In testimony whereof, I have hereunto subscribed my name this eighthday. of June, 1925.

CHARLES F. JAHNIG.

